[PATCH v3 0/4] MR1801: secur32: schannel AcceptSecurityContext support

[Evan Tang (＠etang-cw)]

Adds support for AcceptSecurityContext to secur32 schannel

Note: I'm not especially familiar with the secure channel API and mostly poked things until they worked.  I can confirm it works well enough for [an application](https://store.steampowered.com/app/1787820/Mirror_Party/) using Microsoft's [Microsoft.Extensions.Hosting](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.hosting) .NET api to successfully negotiate a TLS connection with curl though.

--
  v3: secur32: Add test for AcceptSecurityContext
      secur32: Fix AcquireCredentialsHandle algorithm mismatch error return
      secur32: Share code for server and client versions of AcquireCredentialsHandle
      secur32: schannel AcceptSecurityContext support

https://gitlab.winehq.org/wine/wine/-/merge_requests/1801